224 citations · 1.1k across the 22 of their papers we have counts for
21 papers · 1 filter
Analytical attractor for Bjorken expansion
Jean-Paul Blaizot, Li Yan
We present an analytic solution of a simple set of equations that govern the expansion of boost-invariant plasmas of massless particles. These equations describe, approximately, th…
Adiabatic hydrodynamization in rapidly-expanding quark-gluon plasma
Jasmine Brewer, Li Yan, Yi Yin
We propose a new scenario characterizing the transition of the quark-gluon plasma (QGP) produced in heavy-ion collisions from a highly non-equilibrium state at early times toward a…
Nonlinear coupling of flow harmonics: Hexagonal flow and beyond
Giuliano Giacalone, Li Yan, Jean-Yves Ollitrault
Higher Fourier harmonics of anisotropic flow ( and beyond) get large contributions induced by elliptic and triangular flow through nonlinear response. We present a general fra…
A flow paradigm in heavy-ion collisions
Li Yan
The success of hydrodynamics in high energy heavy-ion collisions leads to a flow paradigm, to understand the observed features of harmonic flow in terms of the medium collective ex…
Hydrodynamic modeling of heavy-ion collisions
Li Yan
This contribution presents a theoretical overview of hydrodynamic modelling of heavy-ion collisions, with highlights on some recent developments. In particular, the formulation of…
Onset of hydrodynamics for a quark-gluon plasma from the evolution of moments of distribution functions
Jean-Paul Blaizot, Li Yan
The pre-equilibrium evolution of a quark-gluon plasma produced in a heavy-ion collision is studied in the framework of kinetic theory. We discuss the approach to local thermal equi…
The fluctuations of quadrangular flow
Giuliano Giacalone, Li Yan, Jacquelyn Noronha-Hostler +1
The ATLAS Collaboration has measured for the first time the fourth cumulant of quadrangular flow, . Unlike the fourth cumulants of elliptic and triangular flows, it pre…
Skewness of elliptic flow fluctuations
Giuliano Giacalone, Li Yan, Jacquelyn Noronha-Hostler +1
Using event-by-event hydrodynamic calculations, we find that the fluctuations of the elliptic flow () in the reaction plane have a negative skew. We compare the skewness of $v…
Symmetric cumulants and event-plane correlations in Pb+Pb collisions
Giuliano Giacalone, Li Yan, Jacquelyn Noronha-Hostler +1
The ALICE Collaboration has recently measured the correlations between amplitudes of anisotropic flow in different Fourier harmonics, referred to as symmetric cumulants. We derive…
Nonlinear hydrodynamic response confronts LHC data
Li Yan, Subrata Pal, Jean-Yves Ollitrault
Higher order harmonic flow (with ) in heavy-ion collisions can be measured either with respect to their own plane, or with respect to a plane constructed using lower-o…
Hydrodynamical noise and Gubser flow
Li Yan, Hanna Grönqvist
Hydrodynamical noise is introduced on top of Gubser's analytical solution to viscous hydrodynamics. With respect to the ultra-central collision events of Pb-Pb, p-Pb and p-p at the…
Linear and cubic response to the initial eccentricity in heavy-ion collisions
Jacquelyn Noronha-Hostler, Li Yan, Fernando G. Gardim +1
We study the relation between elliptic flow, and the initial eccentricity, , in heavy-ion collisions, using hydrodynamic simulations. Significant deviations fr…
Universal parameterization of initial-state fluctuations and its applications to event-by-event anisotropy
Li Yan, Jean-Yves Ollitrault, Art M. Poskanzer
We propose Elliptic Power and Power parameterizations for the probability distribution of initial state anisotropies in heavy-ion collisions. By assuming a linear eccentricity scal…
Azimuthal Anisotropy Distributions in High-Energy Collisions
Li Yan, Jean-Yves Ollitrault, Arthur M. Poskanzer
Elliptic flow in ultrarelativistic heavy-ion collisions results from the hydrodynamic response to the spatial anisotropy of the initial density profile. A long-standing problem in…
Eccentricity distributions in nucleus-nucleus collisions
Li Yan, Jean-Yves Ollitrault, Arthur M. Poskanzer
We propose a new parametrization of the distribution of the initial eccentricity in a nucleus-nucleus collision at a fixed centrality, which we name the Elliptic Power distribution…
Plane correlations and hydrodynamic simulations of heavy ion collisions
Derek Teaney, Li Yan
We use a nonlinear response formalism to describe the event plane correlations measured by the ATLAS collaboration. With one exception ($\left\langle \cos(2Ψ_2 - 6Ψ_3 + 4 Ψ_4) \rig…
Universal fluctuation-driven eccentricities in proton-proton, proton-nucleus and nucleus-nucleus collisions
Li Yan, Jean-Yves Ollitrault
We show that the statistics of fluctuation-driven initial-state anisotropies in proton-proton, proton-nucleus and nucleus-nucleus collisions is to a large extent universal. We prop…
Second order viscous corrections to the harmonic spectrum in heavy ion collisions
Derek Teaney, Li Yan
We calculate the second order viscous correction to the kinetic distribution, , and use this result in a hydrodynamic simulation of heavy ion collisions to determine the…
Non-linear flow response and reaction plane correlations
Derek Teaney, Li Yan
We apply the non-linear flow response formalism to the recently measured event plane correlations. We find that as a result of the combined effects of linear and non-linear flow re…
Anisotropic Flow and Viscous Hydrodynamics
Li Yan
We report part of our recent work on viscous hydrodynamics with consistent phase space distribution $f(x,\p)$ for freeze out. We develop the gradient expansion formalism based on k…
Non linearities in the harmonic spectrum of heavy ion collisions with ideal and viscous hydrodynamics
Derek Teaney, Li Yan
We determine the non-linear hydrodynamic response to geometrical fluctuations in heavy ion collisions using ideal and viscous hydrodynamics. This response is characterized with a s…